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Model Access in Xtext [message #735769]

Wed, 12 October 2011 17:04

vishal Mising name

Messages: 4
Registered: October 2011

Junior Member

Hi I am trying to insert a element in the semantic model of xtext.
My xtext grammar looks like this.
Model:
(element += Tag)+;

Tag returns Tag:
'tag' name=ID '{'
(tags += Tag)*
'}'
;

Now programmatically i am trying to add model element in this fashion.
IXtextDocument xtextDocument = .....;
xtextDocument.modify(new IUnitOfWork.Void<XtextResource>() {

@Override
public void process(XtextResource resource) throws Exception {
Model obj = (Model) resource.getContents().get(0);
EList<Tag> tags = obj.getElement();
Tag tagObj = TestFactory.eINSTANCE.createTag();
tags.add(tagObj);
}
});

When the model instance element is added in this fashion. New model element appears in the xtext editor, in the same line. i.e
before adding the model element :
Tag tag1 {

}
after adding the model element :
Tag tag1 {

}Tag tag2{}

I want the line feed to appear after the parenthesis.
Additionally the adapters are missing for the model. how can i add them.
Am i doing it in the wrong way ?

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Re: Model Access in Xtext [message #735771 is a reply to message #735769]

Wed, 12 October 2011 17:11

Christian Dietrich

Messages: 14716
Registered: July 2009

Senior Member

Hi,

the first problem could be related to your formatter (you may have to customize it)
for the second: which adapters are missing?
~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

[Updated on: Wed, 12 October 2011 17:15]

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Re: Model Access in Xtext [message #735805 is a reply to message #735771]

Wed, 12 October 2011 18:58

vishal Mising name

Messages: 4
Registered: October 2011

Junior Member

Hi,

If i see in debug mode the existing model element will have CompositeNodeWithSemanticElement as an Adapter for the model element. Which is not getting created when i create a model element programmitically. Do i have to call the parser once again after i add the model element.

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Re: Model Access in Xtext [message #735952 is a reply to message #735805]

Thu, 13 October 2011 07:55

Jan Koehnlein

Messages: 760
Registered: July 2009
Location: Hamburg

Senior Member

Which version of Xtext are you using?

In 1.x you have to use the DocumentEditor API to make sure your semantic
changes are properly transferred to the model and node model.

In 2.x, it should be enough to usie IXtextDocument.modify

In neither case you should call the parser yourself!

Am 12.10.11 20:58, schrieb vishal:
> Hi,
>
> If i see in debug mode the existing model element will have
> CompositeNodeWithSemanticElement as an Adapter for the model element.
> Which is not getting created when i create a model element
> programmitically. Do i have to call the parser once again after i add
> the model element.

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